Our willow warblers are among the park’s smallest birds; at 8.7 grams, they are only half the size of a robin. Their migration route, though, is the longest of any of the park’s birds: over 8,000km all the way to sub-Saharan Africa, an astonishing feat of endurance, and in April they will come all the way back to the park.
by keithwlarson (CC BY-SA 3.0)
Another migrator from the spring of 2018:
The Chiffchaffs are back